Inches to Centimeters (in to cm)
1 in = 2.54 cm
and 1 cm = 0.393701 in
How to convert Inches to Centimeters
cm = in × 2.54
To convert, multiply the number of inches by 2.54. Example: 10 in × 2.54 = 25.4 cm.
1 inch is exactly 2.54 centimeters by definition (international inch, 1959).
Useful for converting TV and monitor sizes, waist and inseam measurements, and US product dimensions into metric.
Mental shortcut: multiply by 2.5 (underestimates by about 1.6%).
Inches to Centimeters conversion chart
| Inches | Centimeters |
|---|---|
| 1 in | 2.54 cm |
| 2 in | 5.08 cm |
| 3 in | 7.62 cm |
| 4 in | 10.16 cm |
| 5 in | 12.7 cm |
| 6 in | 15.24 cm |
| 7 in | 17.78 cm |
| 8 in | 20.32 cm |
| 9 in | 22.86 cm |
| 10 in | 25.4 cm |
| 11 in | 27.94 cm |
| 12 in | 30.48 cm |
| 13 in | 33.02 cm |
| 14 in | 35.56 cm |
| 15 in | 38.1 cm |
| 16 in | 40.64 cm |
| 17 in | 43.18 cm |
| 18 in | 45.72 cm |
| 19 in | 48.26 cm |
| 20 in | 50.8 cm |
| 21 in | 53.34 cm |
| 22 in | 55.88 cm |
| 23 in | 58.42 cm |
| 24 in | 60.96 cm |
| 25 in | 63.5 cm |
| 26 in | 66.04 cm |
| 27 in | 68.58 cm |
| 28 in | 71.12 cm |
| 29 in | 73.66 cm |
| 30 in | 76.2 cm |
| 31 in | 78.74 cm |
| 32 in | 81.28 cm |
| 33 in | 83.82 cm |
| Inches | Centimeters |
|---|---|
| 34 in | 86.36 cm |
| 35 in | 88.9 cm |
| 36 in | 91.44 cm |
| 38 in | 96.52 cm |
| 40 in | 101.6 cm |
| 42 in | 106.68 cm |
| 44 in | 111.76 cm |
| 46 in | 116.84 cm |
| 48 in | 121.92 cm |
| 50 in | 127 cm |
| 52 in | 132.08 cm |
| 54 in | 137.16 cm |
| 56 in | 142.24 cm |
| 58 in | 147.32 cm |
| 60 in | 152.4 cm |
| 62 in | 157.48 cm |
| 64 in | 162.56 cm |
| 66 in | 167.64 cm |
| 68 in | 172.72 cm |
| 70 in | 177.8 cm |
| 72 in | 182.88 cm |
| 76 in | 193.04 cm |
| 80 in | 203.2 cm |
| 84 in | 213.36 cm |
| 88 in | 223.52 cm |
| 92 in | 233.68 cm |
| 96 in | 243.84 cm |
| 100 in | 254 cm |
| 104 in | 264.16 cm |
| 108 in | 274.32 cm |
| 112 in | 284.48 cm |
| 116 in | 294.64 cm |
| 120 in | 304.8 cm |
Values rounded to 2 decimal places (4 below 1). Use the converter above for more precision.
Frequently asked questions
How many centimeters are in 1 inch?
1 inch = 2.54 centimeters. 1 inch is exactly 2.54 centimeters by definition (international inch, 1959).
How do I convert inches to centimeters?
Multiply the number of inches by 2.54. Example: 10 in × 2.54 = 25.4 cm.
Is there a quick way to estimate in to cm in your head?
Yes — multiply by 2.5. This underestimates by about 1.6%. Use the exact formula (cm = in × 2.54) when precision matters.
How do I convert centimeters back to inches?
Use in = cm ÷ 2.54 — divide the number of centimeters by 2.54. See the Centimeters to Inches page for a full chart.